first example of automatic algorithm assembling

- add "Forges" tools, to wrap several operator with deferred
instanciation.
- add t-forge-algo to show how to enumerate several algorithms instances
from a common grammar and several alternative operators.
- add several missing className().

eo/test/CMakeLists.txt

@@ -71,6 +71,8 @@ set (TEST_LIST
   t-eoParser
   t-eoPartiallyMappedXover
   t-eoEvalCmd
+  t-operator-forge
+  t-forge-algo
   )